Lpc2000

Hi,

I do not find LPC2138 User's Manual after consecutive searches in Philips website. Is it really posted separately.

Sudip Nag


Yahoo! India Matrimony: Find your life partneronline.

[Non-text portions of this message have been removed]

I am working on a battery power instrument and wants to know current
consumption of LPC2132.  Can somebody help?

Vimal Amin

On 4/21/05, sudip nag <sudipnag1@...> wrote:
> 
> 
> Hi,
> 
> I do not find LPC2138 User's Manual after consecutive searches in Philips website. Is it really posted separately.
> 
> Sudip Nag
> 
> Yahoo! India Matrimony: Find your life partneronline.
> 
> [Non-text portions of this message have been removed]
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> 


-- 
Vimal Amin
Digital Systems, Partner
204 Tapo Comm. Center
RamMandir Road
Goregaon (W)
Mumbai 400104
India
Phone : 91 22 2875 4218
Fax : 2874 2093

--- In lpc2000@yahoogroups.com, sudip nag <sudipnag1@y...> wrote:
> 
> 
> 
> Hi,
> 
> I do not find LPC2138 User's Manual after consecutive searches in
Philips website. Is it really posted separately.
> 
> Sudip Nag
> 
> 
> Yahoo! India Matrimony: Find your life partneronline.
> 
> [Non-text portions of this message have been removed]

I found it here www.keil.com/dd/docs/datashts/philips/lpc213x_um.pdf

Regards
Dennis

It is posted in this forum in the files section

Bob

--- In lpc2000@yahoogroups.com, "dlmassey2000" <dlmassey1@v...> wrote:

> 
> --- In lpc2000@yahoogroups.com, sudip nag <sudipnag1@y...> wrote:
> > 
> > 
> > 
> > Hi,
> > 
> > I do not find LPC2138 User's Manual after consecutive searches in
> Philips website. Is it really posted separately.
> > 
> > Sudip Nag
> > 
> > 
> > Yahoo! India Matrimony: Find your life partneronline.
> > 
> > [Non-text portions of this message have been removed]
> 
> I found it here www.keil.com/dd/docs/datashts/philips/lpc213x_um.pdf
> 
> Regards
> Dennis

Hi folks,

I'm setting up comms between an LPC2194 and an FTDI USB chip. It would 
appear that the CTS of the LPC can be connected to the RTS of the FTDI 
device as the FTDI device sets its RTS high when its receive buffer only 
has 32bytes of space left in it. It can thus tell the LPC to stop 
transmitting and it seems that taking the CTS line high on the LPC will, 
indeed, stop the LPC from sending data out.

So, it looks like the RTS of the FTDI chip is really a ready to receive 
signal.

However, it looks like the RTS on the LPC is not quite the same. It 
seems that it really is a request to send, rather than a ready to 
receive signal. The closest pin I can find would seem to be DTR, but I 
don't think it's the same thing at all.

Do I understand correctly? Does the LPC simply not have a pin that can 
drive an external device to tell that external device that it [the 
external device] may send data into the UART of the LPC?

Hope this makes sense, the terminology is rather confusing! ;-)

Rob - who's never done hardware flow control before! :~)

At 04:47 PM 4/22/05 +0100, Robert Wood wrote:
>I'm setting up comms between an LPC2194 and an FTDI USB chip. It would
>appear that the CTS of the LPC can be connected to the RTS of the FTDI
>device as the FTDI device sets its RTS high when its receive buffer only
>has 32bytes of space left in it. It can thus tell the LPC to stop
>transmitting and it seems that taking the CTS line high on the LPC will,
>indeed, stop the LPC from sending data out.
>
>So, it looks like the RTS of the FTDI chip is really a ready to receive
>signal.
>
>However, it looks like the RTS on the LPC is not quite the same. It
>seems that it really is a request to send, rather than a ready to
>receive signal. The closest pin I can find would seem to be DTR, but I
>don't think it's the same thing at all.
>
>Do I understand correctly? Does the LPC simply not have a pin that can
>drive an external device to tell that external device that it [the
>external device] may send data into the UART of the LPC?

I think you are expecting too much of the UART.  As I recall the pins are 
assigned there function by convention only.  You can make them mean 
anything you want them to.  They are controlled strictly by software not by 
the HW.

As a side note, strictly speaking the pins are not defined as flow control 
pins.  They are used that way frequently though and the 232 interface long 
ago lost its connection to the standard definition.

Robert

" 'Freedom' has no meaning of itself.  There are always restrictions,   be 
they legal, genetic, or physical.  If you don't believe me, try to chew a 
radio signal. "  -- Kelvin Throop, III
http://www.aeolusdevelopment.com/

>> I think you are expecting too much of the UART.  As I recall the 
pins are  assigned there function by convention only.  You can make them 
mean
anything you want them to.  They are controlled strictly by software not 
by the HW. <<

Ah, OK.

Thanks for the advice. :-)

Seems pretty odd to name them that if they don't really carry out that 
function. Hey ho...

Cheers,

Rob

At 05:00 PM 4/22/05 +0100, Robert Wood wrote:
>  >> I think you are expecting too much of the UART.  As I recall the
>pins are  assigned there function by convention only.  You can make them
>mean
>anything you want them to.  They are controlled strictly by software not
>by the HW. <<
>
>Ah, OK.
>
>Thanks for the advice. :-)
>
>Seems pretty odd to name them that if they don't really carry out that
>function. Hey ho...

It's more common than you might think.  The most infamous example that I 
know of is the 8255.  The data sheets stated that the chip provided 
handshaking.  It was only by careful reading of the datasheet, usually when 
trying to get it to do the handshaking, that it became obvious that it 
didn't provide handshaking at all but only bits whose direction could be 
set.  Some of the second source manufacturers eventually changed the 
documentation but I don't think Intel ever did.

Robert


" 'Freedom' has no meaning of itself.  There are always restrictions,   be 
they legal, genetic, or physical.  If you don't believe me, try to chew a 
radio signal. "  -- Kelvin Throop, III
http://www.aeolusdevelopment.com/

The good thing you can get a modem status change interupt when CTS
changes. 

--- In lpc2000@yahoogroups.com, Robert Wood <robert.wood@a...> wrote:
>  >> I think you are expecting too much of the UART.  As I recall the 
> pins are  assigned there function by convention only.  You can make
them 
> mean
> anything you want them to.  They are controlled strictly by software
not 

> by the HW. <<
> 
> Ah, OK.
> 
> Thanks for the advice. :-)
> 
> Seems pretty odd to name them that if they don't really carry out that 
> function. Hey ho...
> 
> Cheers,
> 
> Rob

I wish there were a way to re-define some of these dedicated pin
functions...  I can't seem to find more than 2 PWM outputs and have
to give up A/D inputs if I want to use both UARTs.

boB



--- In lpc2000@yahoogroups.com, Robert Wood <robert.wood@a...> wrote:
>  >> I think you are expecting too much of the UART.  As I recall 
the 
> pins are  assigned there function by convention only.  You can make 
them 
> mean
> anything you want them to.  They are controlled strictly by 
software not 
> by the HW. <<
> 
> Ah, OK.
> 
> Thanks for the advice. :-)
> 
> Seems pretty odd to name them that if they don't really carry out 
that 

> function. Hey ho...
> 
> Cheers,
> 
> Rob